#include<stdio.h>
#define N 128
typedef struct myFILE
{
    int fd;
    char buffers[N];
    int buffSize;
    int flag;
}myFILE;
myFILE* myfopen(char* ,char* );
void myfwrite(char* ,size_t ,myFILE* );
void myfclose(myFILE* ); 
void myfflush(myFILE* );
